Wanted: A300 Rev1 circuitry

Solderbro · 17 June 2018, 10:29

Hello,

need to repair and recap my A600 since stupid hotplugging the mouse seems to have shot a 8520 (worst) or something around. No right mouse click possible since then. Sometimes the machine get stopped, seems the caps are old so i will replace them too and maybe ceramic versions are the better choice?
But my first problem is: Found the circuitry map for the Rev 1.5 and 2.0 but mine is different. Do someone have the Rev 1 circuitry map or is it the same like 1.5?

P.S. CSG 8520 PLCC are already in stock at ebay

Greetings
Solderbro

ajk · 17 June 2018, 11:35

There are organic polymer capacitors available these days which are the same size and shape as the original electrolytic ones. But they have solid electrolyte so they won't dry or leak, they are probably the nicest option currently.

Not sure if there are significant differences between the revisions, I would suspect not as far as the mouse is concerned.

Solderbro · 17 June 2018, 15:57

Seems to be the same like Rev 1.5, right mouse use POT0Y and ends at pin 36 from Paula. There the logic tester see a pulled up high and when the mouse is clicked a clean low. I have to replace the PLCC paula to resurrect this functions.

Found such a chip, but it will come from Hong Kong in four weeks. The PLCC is very rare, what is curious because so much Amiga had them inside.

17 June 2018, 10:29	#1
Solderbro Registered User Join Date: Jun 2018 Location: Hamburg Age: 56 Posts: 56	Wanted: A300 Rev1 circuitry Hello, need to repair and recap my A600 since stupid hotplugging the mouse seems to have shot a 8520 (worst) or something around. No right mouse click possible since then. Sometimes the machine get stopped, seems the caps are old so i will replace them too and maybe ceramic versions are the better choice? But my first problem is: Found the circuitry map for the Rev 1.5 and 2.0 but mine is different. Do someone have the Rev 1 circuitry map or is it the same like 1.5? P.S. CSG 8520 PLCC are already in stock at ebay Greetings Solderbro

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17 June 2018, 11:35	#2
ajk Registered User Join Date: May 2010 Location: Helsinki, Finland Posts: 1,341	There are organic polymer capacitors available these days which are the same size and shape as the original electrolytic ones. But they have solid electrolyte so they won't dry or leak, they are probably the nicest option currently. Not sure if there are significant differences between the revisions, I would suspect not as far as the mouse is concerned.

17 June 2018, 15:57	#3
Solderbro Registered User Join Date: Jun 2018 Location: Hamburg Age: 56 Posts: 56	Seems to be the same like Rev 1.5, right mouse use POT0Y and ends at pin 36 from Paula. There the logic tester see a pulled up high and when the mouse is clicked a clean low. I have to replace the PLCC paula to resurrect this functions. Found such a chip, but it will come from Hong Kong in four weeks. The PLCC is very rare, what is curious because so much Amiga had them inside.

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